133523123505 has 16 divisors (see below), whose sum is σ = 213645969024. Its totient is φ = 71209342080.

The previous prime is 133523123497. The next prime is 133523123507. The reversal of 133523123505 is 505321325331.

It is not a de Polignac number, because 133523123505 - 2³ = 133523123497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133523123507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209292 + ... + 557538.

It is an arithmetic number, because the mean of its divisors is an integer number (13352873064).

Almost surely, 2^133523123505 is an apocalyptic number.

133523123505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133523123505 is a deficient number, since it is larger than the sum of its proper divisors (80122845519).

133523123505 is a wasteful number, since it uses less digits than its factorization.

133523123505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373816.

The product of its (nonzero) digits is 40500, while the sum is 33.

Adding to 133523123505 its reverse (505321325331), we get a palindrome (638844448836).

The spelling of 133523123505 in words is "one hundred thirty-three billion, five hundred twenty-three million, one hundred twenty-three thousand, five hundred five".